Rail-sawing machine



(No Model.)

E. 0. SMITH.

BAIL SAWING MACHINE.

No. 367,167. Patented July 26, 1887.

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UNITED STATES EDWARD 0. SMITH, OF BROOKLYN, NEW YORK.

RAlL-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 367,167, dated July 26, 1887.

Application filed April 29, 1886. Serial No. 200,615. (No model.)

To all whom, it may concern.-

Be it known that I, EDWARD 0. SMITH, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Rail-Sawing Machines, of which the following is a specification.

My invention relatesto improvements in rail-sawing machines; and the objects of my improvements are, first, to afford facilities for rocking the saw-frame, and, secondly, to provide a positive automatic movement for feed ing the saw to the rail.

In the accompanying drawings, which fully illustrate the novel features of my invention, Figure 1 is a front elevation of a railsawing machine containing my improvements. Fig. 2 is a transverse section, taken on the line a: of Fig. 1; and Fig. 3 is an enlarged detail face View of the saw-carrying frame, a portion of the same being broken away to show the feeding mechanism.

Referring to the drawings, a is an elongated rectangular frame provided at its lower end with jaws b b, one of which, b, is so bent and shaped as to form a bed or rest for a railway bar or rail, 0, and to which it is firmly clamped by means ofthe threaded bolt d,passing through a threaded opening in the remaining straight e is an inner frame or carriage arranged within the main frame a, which slides up and down between ways or guides f, (see Fig. 2,) formed on the side bars of the said outer frame, a, which guides fit into slots in the side bars of the carriage c.

To shaft, 9, projecting from the sliding carriage e, is pivoted the saw-carrying frame 71, so that the latter may oscillate back and forth past the side of the frame a. Mounted on the same shaft, 9, and secured thereon by nutri, is a triple-armed piece, j, the two upper arms, j, of which are provided with sockets,

into which are inserted lever-bars k, for convenience in operating the same by hand. The central downwardly-projecting arm j is se cured at its lower end to the saw-carrying frame h by means of pin k and nut Z. The lower or swinging end of the saw-carrying frame is prolonged by arms m m to form a fork within which is secured the toothed saw-blade n, the cutting-edge of which is the arc of a circle concentric with the pivotal pointof the frame h. The saw-blade is rigidly fastened at one end, and is secured at the other by a screwbolt, 0, projecting through the opposite arm, m, and carrying the threaded nut 12, by which the saw maybe tightened.

The oscillation of the saw-carrying frame his efiected by moving the arms j alternately up and down. As. the saw-blade is moved back and forth over the rail it is fed downward upon the latter by the downward movement of the carriage 0 within the frame a, and the movement of the carriage is governed by the threaded shaft g, which passes through the crossbar r of said carriage e, and is led upward through a threaded opening in the upper part of the frame a, and terminates in ahandwheel, a, by which it may be rotated to raise or lower the carriage c.

In lieu of the crank for moving the carriage to feed the saw, I provide an automatic feed, as follows: A ratchet-wheel, s, is mounted on the screw-shaft q, and to the cross-beam r of 5 the sliding carriage c is pivoted the inner end of an arm, 2, having on its lower end a pawl, w, with a coilspring, c, which pawl 'is made to engage the ratchet at each revolution of the shaft q. From the arm t projects a stud, w, and on the inner surface of the arm j is secured at cross-piece, 0, having lugs d, so that as the saw-frame h is moved'toand fro the framej is made to oscillate, causing-the lugs 01 to strike the stud as, moving the arm t back and forth,'and causing the pawl to move the ratchet one step at a time, rotating the shaft q and lowering the carriage e, which carries the saw-frame. The lateral movement of the saw-frame is controlled by means of a pin, h, which projects from the frame a and works in slot formed in the saw-frame.

,The movement of the spring-pawl, as it engages the ratchet-wheel s, is limited by the pin f working in slot e. (See Fig. 2.)

In place of the independent portion j and j, as hereinbefore described, for operating the saw-frame, the saw-frame itself may be constructed with projecting horizontal arms for operating it. What I claim as new, and desire to secure by Letters Patent, is

1. In a rail-sawing machine, the main frame, a vertically-sliding carriage, with suitable means for moving said carriage, combined with a saw-carrying frame pivoted to the movable carriage so as to swing outside of the main frame, and provided with horizontal arms for operating it, and having a slot-and-pin connection with the sliding carriage, as set forth.

2. The combination, in a rail-sawing machine, of a main frame, a sliding carriage, means for moving said carriage, a saw-frame pivoted on a shaft projecting from the movable carriage, and a triple-armed frame secured to said saw-frame and shaft and provided with sockets for receiving lever-bars, as set forth.

3. In a rail-sawing machine, the combination of a main frame, a movable carriage mounted in said frame carrying an oscillating saw-frame, with an arm pivoted to the said carriage and provided with a movable pawl adapted to engage with a ratchet-wheel mounted on a vertical screw-shaft, and a stud arranged to contact with lugs on the saw-1 rame for feeding the saw to the rail, as set forth.

4:. The combination, with the main frame, sliding carriage, and screw-shaft mounted in said carriage, of an arm pivoted to the sliding carriage carrying a spring-actuated pawl arranged to engage a ratchet-wheel on the screwshaft, and an oscillating saw-carrying frame provided with lugs arranged to contact with astnd on said arm for operating the same, as set forth.

EDWARD 0. SMITH. \Vitnesses:

K. NEWELL, A. M. FELTON. 

